JP4721896B2 - Sheet / film forming roll, crowning control method for sheet / film forming roll, and sheet / film forming apparatus - Google Patents

Description

The present invention, sheet or film relates molding roll and the sheet or film crowning control method and sheet over preparative film forming apparatus of the forming roll, in particular, crowning control how the touch roll and the touch roll suitable for forming the thin film sheet it relates to.

As a sheet or film forming method, a T-die from the molten resin is supplied between the main roll and the sub roll pairs (touch roll), those of the touch roll system for continuously forming a sheet film is known ing.

  In this type of sheet / film molding, a relatively thick sheet is formed by using a touch roll whose outer peripheral surface is flat in the axial direction, and even if the roll pressing force is increased, the touch roll has a molten resin surface over its entire width. The sheet contact state is maintained, and sheet forming with good surface properties can be performed.

  However, in thin film molding, when the roll pressing force increases, the touch roll bends in a bow shape, and the roll gap at the center in the axial direction becomes larger than the roll gap in the axial end region. The pressing pressure at the axial center of the touch roll is weakened. For this reason, touch omission occurs in the axial center of the touch roll, and the surface property of the molded product is impaired.

  On the other hand, there is a touch roll having a double structure of an outer cylinder and an inner cylinder, and the outer cylinder is made of a metal thin structure and crowned on the outer shape of the roll (for example, Patent Document 1).

  However, in actual sheet / film molding, the optimum roll pressing force varies depending on the thickness of the film to be molded, the type of resin, and the like, and as a result, the optimum crowning amount also varies. For this reason, when a certain crowning is applied to the outer shape of the roll, the touch roll lacks versatility.

  On the other hand, the outer peripheral surface of the touch roll is constituted by a thin metal outer cylinder, and by adjusting the pressure of the heat medium (cooling water) supplied into the thin metal outer cylinder, crowning according to the pressure is performed. There is one that variably imparts to a thin metal outer cylinder (for example, Patent Documents 2 and 3).

In the case of a rubber roll inscribed type that supports internal pressure of a thin metal outer cylinder with a rubber roll, the thin metal outer cylinder is elastically deformed following the outer peripheral surface of the main roll by a pressing load against the main roll. As in the touch roll shown in FIG. 2, it is possible to form a thinner sheet / film than a case in which the outer cylinder has a thin metal structure.
JP 2002-36332 A Japanese Patent No. 3422798 Japanese Patent Laid-Open No. 2000-506695

  However, in the touch roll as shown in Patent Documents 2 and 3, since the pressure of the heat medium circulating in the thin metal outer cylinder is adjusted, pressure fluctuation is likely to occur, and the crowning application amount is not stable. Further, unless the pressure of the heat medium circulating in the thin metal outer cylinder is stopped at most about 450 to 600 kPa, the seal pressure resistance is insufficient and leakage may occur.

  In addition, the inside of the thin metal outer cylinder is made into a double structure, a pressure chamber is created on the inner peripheral surface side of the thin metal outer cylinder, and the pressure supplied to the pressure chamber can be adjusted to variably set the crowning amount. However, in this case, heat transfer of the heat medium to the thin metal outer cylinder is hindered by the pressure chamber, making it difficult to control the temperature of the roll surface.

  The problem to be solved by the present invention is to enable stable application of crowning of a sheet / film forming roll without making it difficult to control the temperature of the roll surface.

A sheet / film forming roll according to the present invention is a sheet / film forming roll in which a metal elastic outer cylinder is deformed by crowning by supplying an incompressible fluid under pressure control. An elastic cylinder body made of an elastic body is provided between the shaft portions, and the inner cylinder member rotatably supported by the bearing portion with the shaft portion and the shaft portions at both ends of the inner cylinder member are rotatably mounted. An eccentric side plate that is rotatably supported by both the eccentric side plates, has an inner diameter larger than the outer diameter of the inner cylinder member, accommodates the inner cylinder member in a cylinder, and an inner peripheral surface of the inner cylinder member and a cylindrical of the metallic elastic external cylinder of thin structure in contact with the outer peripheral surface, the elastic cylindrical body is adapted in a sealed container structure forming the pressure chamber in the cylinder, a non into the pressure chamber An incompressible fluid introduction passage for introducing a compressive fluid is formed. There.

  In the sheet / film forming roll according to the present invention, preferably, a heat medium circulation passage for circulating a heat medium in the cylinder of the metal elastic outer cylinder is formed separately from the incompressible fluid introduction passage.

Sheet or film forming roll according to the present invention, preferably, the elastic cylindrical body is constituted with a metal cylindrical member, by the rubber rolls rubbery elastomer made of which is mounted on the outer peripheral surface of the metallic cylindrical member, The outer peripheral surface of the rubber roll is in contact with the inner peripheral surface of the metal elastic outer cylinder.

  The sheet / film forming roll according to the present invention preferably has a gear mechanism for transmitting the rotation of the inner cylinder member to the metal elastic outer cylinder.

  In the sheet / film forming roll according to the present invention, preferably, the shaft portion of the inner cylindrical member is drivingly connected to an electric motor, and the inner cylindrical member is rotationally driven by the electric motor.

Sheet or film forming roll according to the present invention preferably has a detent portion for detent said eccentric plate, said detent portion is a structure capable of variably setting the detent position in the circumferential direction of the eccentric plate Yes.

The crowning control method for a sheet / film forming roll according to the present invention uses the sheet / film forming roll according to the above-described invention, and the pressure of the incompressible fluid introduced into the pressure chamber is determined when the sheet / film is formed. Control is performed according to the pressing force setting value of the forming roll, and crowning is performed according to the pressing force setting value.

The present invention Cie over preparative film forming apparatus by the is obtained by applying a sheet film forming roll according to the invention described above the touch roll.

In the sheet / film forming roll according to the present invention, the elastic cylinder has a structure for introducing an incompressible fluid into a pressure chamber having a sealed structure formed in the cylinder, and the pressure of the incompressible fluid supplied to the pressure chamber. Is adjusted, the elastic cylindrical body undergoes crowning deformation according to the pressure (internal pressure of the elastic cylindrical body), and the metallic elastic outer cylinder deforms crowning following this.

This makes it possible to variably apply the crowning of the sheet / film forming roll without making it difficult to control the temperature of the surface of the sheet / film forming roll separately from circulating the heat medium in the cylinder of the metal elastic outer cylinder. It will be performed stably without receiving disturbances such as.

First, an outline of a sheet / film forming method using the sheet / film forming roll according to the present invention will be described with reference to FIG. The sheet or film forming process, the molten resin M from a T-die 100, and supplied between the main roll 101 and the slave roll (touch roll) 102 paired, continuously shaping the sheet or film F. The sheet / film forming roll according to the present invention is applied to a secondary roll (touch roll) 102.

  One embodiment of a sheet / film forming roll according to the present invention will be described with reference to FIGS.

  The sheet / film forming roll 10 includes an inner cylinder member 20 and a metal elastic outer cylinder 50.

The inner cylinder member 20 includes a shaft member 21 on the operation side (right side in FIGS. 1 and 2), a shaft member 22 on the drive side (left side in FIGS. 1 and 2), and the shaft members 21 and 22. It is comprised by the elastic cylinder 25 fixedly attached to the flange parts 23 and 24 integrally formed in the front-end | tip. The shaft member 21 and the shaft member 22 are concentrically arranged, and the elastic cylinder 25 is between the left and right flange portions 23 and 24 opposed to each other and is fixedly connected to the flange portions 23 and 24 at both ends. Concentric with.

  The elastic cylinder 25 includes a metal cylindrical member 26 whose both ends are welded to the flange portions 23 and 24, and a rubber roll 27 attached to the outer peripheral surface of the metal cylindrical member 26. The rubber roll 27 is made of a rubber-like elastic material such as silicon rubber or ethylene propylene rubber, and is attached to the entire outer peripheral surface of the metal cylindrical member 26.

  The inner side (inside the cylinder) of the metallic cylindrical member 26 of the elastic cylinder 25 is a pressure chamber 28 having a sealed structure in which both ends are closed by flange portions 23 and 24. In other words, the elastic cylindrical body 25 has a sealed container structure in which a pressure chamber 28 having a sealed structure is formed in a cylinder of the metal cylindrical member 26 by the metal cylindrical member 26 and the flange portions 23 and 24 of the shaft members 21 and 22. It has become.

Since both ends of the metal cylindrical member 26 and the rubber roll 27 are constrained by the flange portions 23 and 24, they are elastically deformed into a drum shape according to the pressure value of the oil introduced into the pressure chamber 28, and the inner cylindrical member 20 is variably given crowning according to the internal pressure of the pressure chamber 28.

An incompressible fluid introduction passage 29 for introducing an incompressible fluid into the pressure chamber 28 is formed in the shaft member 22 . The incompressible fluid introduction passage 29 opens to the pressure chamber 28 on one side and opens to the center of the shaft end of the shaft member 22 on the other side, and communicates with the external pipe 37 by a rotary joint 36 connected to the shaft end of the shaft member 22. Oil that is an incompressible fluid is supplied from the external pipe 37.

Oil from a hydraulic pressure source 38 that generates a constant hydraulic pressure is supplied to the external pipe 37 under pressure control by a pressure control valve 39.

The pressure control valve 39 is electrically operated by a stepping motor or the like, and is controlled by a pulse command output from the crowning control device 40 to quantitatively control the pressure value of oil supplied to the external pipe 37.

  The crowning control device 40 is of an electronic control type by a computer or the like, and includes a touch roll pressing force setting value, information on the thickness of the sheet / film to be molded, information on the type of resin of the sheet / film to be molded, etc. Based on these, the control target hydraulic pressure value for obtaining the optimum crowning amount is calculated based on these, and the control target hydraulic pressure value and the hydraulic pressure value of the external pipe 37 measured by the pressure sensor 41 connected to the external pipe 37 are calculated. A pulse command for zero control deviation is output to the pressure control valve 39.

  As a result, the hydraulic pressure of the external pipe 37 is controlled to the control target hydraulic pressure value in a feedback control manner by the pressure control valve 39, and the pressure in the pressure chamber 28 becomes equal to the control target hydraulic pressure value accordingly.

The inner cylinder member 20 is rotatably supported by the operation side bearing portion 90 and the drive side bearing portion 91 with shaft members (shaft portions) 21 and 22 , respectively, and is rotatable about its own central axis. That is, the operation-side bearing portion 90 and the drive-side bearing portion 91 rotatably support the shaft members 21 and 22 at both ends of the inner cylinder member 20 by the bearing members 92 and 93.

  The drive-side shaft member 22 is drivingly connected to an electric motor (electric motor) 30 by a belt-type power transmission mechanism 31. Thereby, the inner cylinder member 20 is drivingly connected to the electric motor 30 and is rotationally driven by the electric motor 30. The electric motor 30 may be provided with a speed reducer, and a speed reduction mechanism may be incorporated between the shaft member 22 and the electric motor 30.

  The shaft members 21 and 22 of the inner cylinder member 20 rotatably support the disk-shaped eccentric side plates 53 and 54 by means of rolling bearings 51 and 52, respectively. The centers Cb of the eccentric side plates 53 and 54 are eccentric with respect to the center Ca of the inner cylinder member 20 with an eccentricity e (see FIG. 4).

The metal elastic outer cylinder 50 is a cylindrical body made of a thin metal plate such as stainless steel and has a flexible thin wall structure. Ring-shaped end members 81 and 82 are integrally attached to both ends. Yes. Inside of each of the end members 81 and 82 are ring-shaped gear attachment member 83, 84 is attached to one body manner.

The eccentric side plates 53 and 54 rotatably support the gear mounting members 83 and 84 by rolling bearings 55 and 56, respectively, on the outer peripheral surface portion. Thereby, both ends of the metal elastic outer cylinder 50 are rotatably supported on the eccentric side plates 53 and 54 by the rolling bearings 55 and 56 via the end members 81 and 82 and the gear mounting members 83 and 84.

  The metal elastic outer cylinder 50 has an inner diameter Rb (see FIG. 3) sufficiently larger than the outer diameter Ra of the rubber roll 27 of the inner cylinder member 20, and the rubber roll 27 is accommodated in the cylinder 68, Due to the eccentricity, the inner peripheral surface 50 </ b> A is in contact with the outer peripheral surface 27 </ b> A of the rubber roll 27 on the eccentric approach side (right side as viewed in FIG. 3).

  In an unloaded state, the outer peripheral surface 27A of the rubber roll 27 and the inner peripheral surface 50A of the metal elastic outer cylinder 50 are not in contact, and the outer peripheral surface 27A of the rubber roll 27 and the inner peripheral surface of the metal elastic outer cylinder 50 are not in contact. 50A, there is a gap between the outer peripheral surface 27A of the rubber roll 27 and the inner peripheral surface 50A of the metallic elastic outer cylinder 50 by elastic deformation of the metallic elastic outer cylinder 50 due to contact with the main roll 101. May come into contact. This facilitates the assembly of the inner cylinder member 20 to which the rubber roll 27 is attached and the metal elastic outer cylinder 50.

  Internal gears (pinions) 32 and 33 are fixedly mounted on the outer peripheral portions of the shaft members 21 and 22 of the inner cylinder member 20, respectively. Ring-shaped external gears 34 and 35 are fixedly mounted on the gear mounting members 83 and 84 integral with the metal elastic outer cylinder 50 concentrically with the metal elastic outer cylinder 50, respectively. The internal gears 32 and 33 and the external gears 34 and 35 are meshed with each other on the eccentric approach side (the right side in FIG. 3). By this engagement, the rotation of the shaft members 21, 22, that is, the rotation of the inner cylinder member 20 is transmitted to the metal elastic outer cylinder 50.

Incidentally, the internal teeth wheel 3 2, 33, the external gear 34 and 35, rather than in-cylinder 68, may be provided on the outer cylinder.

The number of teeth of the internal wheel 3 2, 33 Za, Zb the number of teeth of the external gear 34, the outer diameter of the rubber roll 27 Ra, when the inner diameter of the metallic elastic outer sleeve 50 and Rb, Za = Zb ( By setting the number of teeth of Rb / Ra), the peripheral speed of the outer peripheral surface of the rubber roll 27 and the peripheral speed of the inner peripheral surface of the metal elastic outer cylinder 50 become the same, and the outer peripheral surface 27A of the rubber roll 27 and the metal elastic The metallic elastic outer cylinder 50 is forcibly driven to rotate without causing any slip between the inner circumferential surface 50 </ b> A of the outer cylinder 50.

The eccentric side plates 53 and 54 are connected to the operation side bearing portion 90 and the drive side bearing portion 91 by the rotation preventing portions 57 and 58, respectively, and are prevented from rotating. By the rotation prevention, the eccentric direction of the eccentric side plates 53 and 54 with respect to the inner cylinder member 20 and the rubber roll 27 is determined. As shown in FIG. 3, the eccentric direction is set so that the side of the sheet / film forming roll (touch roll) 10 facing the main roll 101 is the eccentric approaching side (right side in FIG. 3). Has been. In other words, the eccentric direction is set so that the center Ca of the inner cylinder member 20 is positioned closer to the main roll 101 than the center Cb of the eccentric side plates 53 and 54 (see FIG. 4).

  Thereby, the rubber roll 27 is in contact with the inner peripheral surface 50 </ b> A of the metal elastic outer cylinder 50 on the side where the metal elastic outer cylinder 50 is pressed against the main roll 101 (right side in FIG. 3).

As shown in FIG. 4, the anti-rotation portions 57 and 58 are provided with a protruding piece 59 fixedly attached to the eccentric side plates 53 and 54, and an attachment fixedly attached to the operation side bearing portion 90 and the drive side bearing portion 91. The adjustment screws 62 and 63 are screw-engaged with the pieces 60 and 61. The adjustment screws 62 and 63 sandwich the projecting piece 59 from both sides to prevent the eccentric side plates 53 and 54 from rotating.

  Further, by adjusting the screwing amounts of the adjusting screws 62 and 63, the pinching position of the protruding piece 59 can be changed in the circumferential direction of the eccentric side plates 53 and 54 (clockwise direction and counterclockwise direction). Thereby, the rotation stop position of the circumferential direction of the eccentric side plates 53 and 54 can be variably set. Thus, the amount of eccentricity on the pressing side of the metal elastic outer cylinder 50 with respect to the main roll 101 can be increased or decreased.

  Seal members 64 and 65 are attached between the shaft members 21 and 22 of the inner cylinder member 20 and the eccentric side plates 53 and 54, and the gear attachment members 83 and 84 of the eccentric side plates 53 and 54 and the metal elastic outer cylinder 50 are attached. Between them, seal members 66 and 67 are attached. Thereby, the cylinder interior 68 of the metal elastic outer cylinder 50 has a liquid-tight structure different from the pressure chamber 28 of the inner cylinder member 20.

  A central hole 69 is formed in the shaft member 21 on the operation side. A tube 70 is inserted into the center hole 69, and a heat medium supply passage 71 and a heat medium discharge passage 72 are formed inside and outside the tube 70. The heat medium supply passage 71 and the heat medium discharge passage 72 are connected to a fixed-side cooling water supply nipple and a cooling water discharge nipple, respectively, by a double-structure rotary joint (not shown) attached to the shaft end of the shaft member 21. Has been.

The heat medium supply passage 71 is spanned between the flange portions 23 and 24, and extends to the in-tube passage 74 of the tube 73 extending across the central portion of the inner cylinder member 20 in the axial direction, and to the drive-side shaft member 22. The heat medium supply holes 75 and 76 that are formed communicate with one end side (left end side) of the cylinder interior 68 of the metal elastic outer cylinder 50. The heat medium discharge passage 72 communicates with the other end side (right end side) of the cylinder 68 of the metal elastic outer cylinder 50 through a heat medium discharge hole 77 formed in the shaft member 21. These form a heat medium circulation passage for circulating the heat medium in the cylinder 68 of the metal elastic outer cylinder 50 separately from the incompressible fluid introduction passage 29.

The cooling water (heat medium) passes through a rotary joint, a heat medium supply passage 71, a pipe passage 74, and a heat medium supply hole 75 from a cooling water supply nipple (not shown), and is made of a metal elastic outer cylinder from the heat medium supply hole 76. It is supplied to one end side of 50 cylinders 68. Thereby, the cylinder 68 of the metal elastic outer cylinder 50 is filled with the cooling water. Cooling water cylinder 68, the cylinder 68 flows from one end to the other end side, enters the heating medium discharge passage channel 72 from the heat medium discharge hole 77, the rotary joint, not shown, it flows into the cooling water discharge nipple It is discharged outside.

Sheet or film forming roll 10 by the configuration described above, the electric motor 30 by the inner cylindrical member 20 is operation-side bearing portions 90, while being bearing supported by the drive-side bearing portions 91, rotating around a central axis around (center Ca of its Rotation).

The rotation of the inner cylinder member 20 is transmitted to the metal elastic outer cylinder 50 by the meshing of the internal gears 32 and 33 and the external gears 34 and 35, so that the metal elastic outer cylinder 50 is rotatable to the eccentric side plates 53 and 54. It is supported and rotates around its own central axis while the rubber roll 27 is inscribed.

  Since the rotation drive of the metal elastic outer cylinder 50 is a gear-type forced drive, the metal elastic outer cylinder 50 rotates in synchronization with the rotation of the inner cylinder member 20 reliably, and the metal elastic outer cylinder 50 is rotated. And the rubber roll 27 does not slip.

Since the sheet / film forming roll 10 is of a rubber roll inscribed type in which the inner pressure of the metal elastic outer cylinder 50 is supported by the rubber roll 27 from the inside, the metal elastic outer cylinder 50 is pressed by the pressing load on the main roll 101. The elastic deformation follows the outer peripheral surface of the main roll 101, so that the condition is good, and it is possible to form a thinner sheet / film than a case in which the outer cylinder has a thin metal structure.

In addition, the sheet / film forming roll 10 can be driven in the same manner as in the conventional sheet / film forming roll by simply connecting the electric motor 30 to the shaft member 22 supported by the driving-side bearing portion 91. It can be rotationally driven by the mechanism, and can be used as it is in a general existing sheet / film forming apparatus without complicating the structure of the drive system.

  Further, since the amount of eccentricity can be adjusted by the adjusting screws 62 and 63 of the non-rotating portions 57 and 58, the adjustment for compensating the wear of the rubber roll 27 can be easily performed, and the internal pressure is supported by the wear of the rubber roll 27. Even if a deviation occurs in the pressing pressure distribution, an adjustment to eliminate it can be performed even during use.

The inner cylindrical member 20, and rotates the metallic elastic outer cylinder 50 under a state where the molding is being carried out of the sheet or film, by a pulse command from click Rauningu controller 40, the pressure control valve 39 is outputted to the external pipe 37 The pressure value of the oil to be controlled is controlled to a hydraulic pressure value at which the optimum crowning amount can be obtained according to the touch roll pressing force setting value, the thickness of the sheet / film to be molded, and the type of resin of the sheet / film to be molded. Oil is introduced into the pressure chamber 28 of the inner cylinder member 20.

  As a result, the elastic cylinder 25 undergoes crowning deformation (elastic deformation) according to the hydraulic pressure value (internal pressure of the elastic cylinder 25), and the metal elastic outer cylinder 50 undergoes crowning deformation (elastic deformation) following this.

  Thereby, apart from circulating the heat medium in the cylinder 68 of the metal elastic outer cylinder 50, crowning by the optimum crowning amount is given to the sheet / film forming roll 10 without making the temperature control of the roll surface difficult. Is done.

Unlike the pressure of the heat medium circulating in the cylinder 68 of the metal elastic outer cylinder 50, the pressure value of the oil supplied to the pressure chamber 28 can be set to a high pressure of 10 MPa or more. , 65, 66, and 67 are not affected. Since the oil in the pressure chamber 28 is not circulated in the pressure chamber 28, a stable pressure state is obtained, and thereby, the variable application of the crowning is stably performed.

  When the amount of crowning is insufficient with only the hydraulic pressure supplied to the pressure chamber 28, the elastic cylinder 25 of the inner cylinder member 20 is formed in a drum shape with a minimum crowning as an initial shape. Also good.

In the sheet / film forming roll according to the present invention, the internal gears 32, 33 and the external gears 34, 35 are not essential for rotationally driving the metal elastic outer cylinder 50, but the rubber roll 27 of the inner cylinder member 20 and the metal elasticity are not required. When the rotation of the inner cylinder member 20 and the rubber roll 27 is sufficiently transmitted to the metal elastic outer cylinder 50 due to the friction of the contact portion with the outer cylinder 50, the internal gears 32 and 33 and the external gears 34 and 35 are Can be omitted. Further, in the case of forced driving by the internal gears 32 and 33 and the external gears 34 and 35, the rubber roll 27 of the inner cylinder member 20 is not essential, and the elastic cylinder 25 is formed by molding a sheet or film that is not so thin. You may be comprised only with the metal cylinder which can be elastically deformed.

It is sectional drawing which shows one Embodiment of the sheet | seat film forming apparatus incorporating the sheet | seat film forming roll by this invention. It is sectional drawing which expands and shows the principal part of one Embodiment of the sheet | seat film forming roll by this invention. It is line AA expanded sectional drawing of FIG. FIG. 3 is an enlarged sectional view taken along line BB in FIG. 1. It is explanatory drawing which shows the outline | summary of the sheet | seat film forming method using the sheet | seat film forming roll by this invention.

Explanation of symbols

10 Sheet / film forming roll 20 Inner cylinder member 21, 22 Shaft member (shaft portion)
23, 24 Flange 25 Elastic cylinder 26 Metal cylindrical member 27 Rubber roll 27A Outer peripheral surface 28 Pressure chamber 29 Incompressible fluid introduction passage 30 Electric motor 31 Power transmission mechanism 32, 33 Internal gear 34, 35 External gear 36 Rotary joint 37 External piping 38 Hydraulic source 39 Pressure control valve 40 Crowning control device 41 Pressure sensor 50 Metal elastic outer cylinder 50A Inner peripheral surface 51, 52 Rolling bearing 53, 54 Eccentric side plate 55, 56 Rolling bearing 57, 58 Anti-rotation part 59 Projection piece 60, 61 Mounting piece 62, 63 Adjustment screw 64, 65, 66, 67 Seal member 68 In-cylinder 69 Center hole 70 Tube 71 Heat medium supply passage 72 Heat medium discharge passage 73 Tube 74 In-tube passage 75, 76 Heat medium supply hole 77 Heat medium discharge hole 81, 82 End member 83, 84 Gear mounting member 90 Operation side shaft Receiving portion 91 Drive side bearing portion 92, 93 Bearing member
100 T-die 101 Main roll 102 Sub roll (touch roll)

Claims (8)

In the sheet / film forming roll in which the metal elastic outer cylinder is deformed by crowning by supplying the incompressible fluid under pressure control,
An inner cylindrical member having a shaft portion at both ends, an elastic cylinder made of an elastic body between the shaft portions, and rotatably supported by the bearing portion with the shaft portion;
An eccentric side plate rotatably mounted on each of the shaft portions at both ends of the inner cylinder member;
It is rotatably supported by the eccentric side plates, has an inner diameter larger than the outer diameter of the inner cylinder member, accommodates the inner cylinder member in a cylinder, and an inner peripheral surface is in contact with an outer peripheral surface of the inner cylindrical member and a the metallic elastic external cylinder cylindrical thin structure,
The elastic cylinder has a closed container structure that constitutes a pressure chamber in the cylinder, and has an incompressible fluid introduction passage for introducing an incompressible fluid into the pressure chamber.
A sheet / film forming roll. In the sheet / film forming roll according to claim 1,
The formed separately from the heat medium circulating passage for circulating the heating medium in the cylinder of the metallic elastic outer cylinder and the incompressible fluid inlet passage,
A sheet / film forming roll. In the sheet / film forming roll according to claim 1 or 2,
The elastic cylinder includes a metal cylindrical member and a rubber roll made of a rubber-like elastic body attached to an outer peripheral surface of the metal cylindrical member, and the metal elastic outer cylinder has an outer peripheral surface of the rubber roll. In contact with the inner peripheral surface of the
A sheet / film forming roll. In the sheet film forming roll according to any one of claims 1 to 3,
A gear mechanism for transmitting rotation of the inner cylinder member to the metal elastic outer cylinder ;
A sheet / film forming roll. In the sheet film forming roll according to any one of claims 1 to 4,
The shaft portion of the inner cylinder member is drivingly connected to an electric motor, and the inner cylinder member is rotationally driven by the electric motor;
A sheet / film forming roll. In the sheet / film forming roll according to any one of claims 1 to 5,
A detent portion for derotating the eccentric side plate;
The detent portion has a structure that can variably set the detent position in the circumferential direction of the eccentric side plate.
A sheet / film forming roll. The sheet / film forming roll according to any one of claims 1 to 6, wherein the pressure of the incompressible fluid introduced into the pressure chamber is determined by the sheet / film forming roll at the time of forming the sheet / film. Control according to the pressing force setting value and perform crowning according to the pressing force setting value.
A method for controlling crowning of a sheet / film forming roll. Applying the sheet or film forming roll according to the touch roll Izu Re or one of claims 1 to 6,
A sheet / film forming apparatus characterized by that .

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